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Zero pressure and permeation for preparation of carbon nanometer tube reinforced aluminum base composite material

A technology of carbon nanotubes and composite materials, which is applied in the field of preparing carbon nanotubes reinforced aluminum matrix composite materials by pressureless infiltration, can solve the problems of difficulty in preparing large components, difficulty in controlling particle uniformity, and limitation of reinforcement phase ratio, etc. Low requirements for equipment, high density and uniform distribution

Inactive Publication Date: 2004-11-17
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For example, hot pressing method and vacuum suction casting method require special high pressure and vacuum equipment; semi-solid method, the proportion of reinforcing phase is limited, and the uniformity of particles is difficult to control; powder metallurgy method is difficult to prepare large components

Method used

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  • Zero pressure and permeation for preparation of carbon nanometer tube reinforced aluminum base composite material
  • Zero pressure and permeation for preparation of carbon nanometer tube reinforced aluminum base composite material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] The powder with volume content of CNTs=10%, Mg=20%, Al=70% is ball-milled and blended in a stainless steel tank under the protection of argon, and the ball-milled powder is molded into a preform and put into a stainless steel crucible, and the aluminum Place the alloy on top of the reinforced powder, put them together in a tube furnace, heat them to 800°C under a nitrogen atmosphere, and keep them warm for five hours, then take them out after the furnace cools down, and then get a carbon nanotube reinforced aluminum with a volume content of 10%. base composite material. figure 2 Shown is the field emission scanning (FEG-SEM) photograph of the fracture of the carbon nanotube-reinforced aluminum matrix composite after infiltration.

Embodiment 2

[0015] The powder with volume content of CNTs=5%, Mg=21.1%, Al=73.9% is ball milled and blended under the protection of argon in a stainless steel tank, and the ball milled powder is molded into a preform and put into a stainless steel crucible, and the aluminum The alloy is placed above the reinforced powder, and then they are put together in a tube furnace and heated to 800°C under a nitrogen atmosphere, and kept for five hours, and then taken out after the furnace cools down to obtain a carbon nanotube reinforced aluminum with a volume content of 5%. base composite material.

Embodiment 3

[0017] The powder with the volume content of CNTs=20%, Mg=17.8%, Al=62.2% is ball milled and blended in a stainless steel tank under the protection of argon, and the ball milled powder is molded into a preform and put into a stainless steel crucible. Place the aluminum alloy on top of the reinforced powder, put them together in a tube furnace, heat them to 800°C under a nitrogen atmosphere, keep them warm for five hours, and take them out after the furnace cools down, so that the carbon nanotubes with a volume content of 20% are produced Reinforced aluminum matrix composites.

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Abstract

The invention relates to a zero pressure and permeation for preparation of carbon nanometer tube reinforced aluminum base composite material which comprises, mixing nano carbon tube, magnesium powder and aluminium powder of a finite proportion through mechanical mode or ball mill blending in stainless steel tank with the existence of argon shield, loading into stainless steel crucible or moulding the ball milled powder into pre-cast members, placing into stainless steel crucible, heating pure aluminium or aluminium alloy in nitrogen atmosphere to 750-1000 deg. C, thermal insulation for a finite period of time, cooling down and discharging.

Description

technical field [0001] The invention relates to a method for preparing carbon nanotube reinforced aluminum-based composite material by adopting pressureless infiltration. Background technique [0002] Al-based composite materials have the advantages of low density, corrosion resistance and good processing performance. With the development of modern industries such as aviation, aerospace and automobile manufacturing, the specific strength, specific stiffness, wear resistance, heat resistance and Performance such as anti-fatigue puts forward higher requirements. Nano-phase reinforced Al-based composites are a new type of material developed rapidly in recent years, showing excellent physical, chemical and mechanical properties. Carbon nanotubes are a new type of self-assembled single-molecule material. It is theoretically estimated that its Young's modulus is as high as 5TPa, its strength is about 100 times that of steel, and its density is only 1 / 6 o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C1/05C22C21/00
Inventor 丁志鹏张孝彬许国良刘芙李宗全涂江平李昱杨晓芳何金孝
Owner ZHEJIANG UNIV
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